Arc-shaped screen and arc-shaped screen striking device

Abstract

The application provides a kind of arc screen hitting device and arc screen, relate to arc screen field, adopt scheme is: including mounting frame, still include: drive assembly, drive assembly is set in mounting frame;Driving shaft, driving shaft is rotatably set on mounting frame, driving shaft is set along the width direction of arc screen, at least two eccentric wheels are set on driving shaft;Hitting rod, hitting rod is movably set in the guide hole on mounting frame along the axial direction of itself, the number of hitting rod is same with the number of eccentric wheel, the upper end of hitting rod is provided with pressing plate, pressing plate can be in contact with eccentric wheel, the lower end of hitting rod is provided with hitting head;Buffer spring, buffer spring is sleeved on hitting rod, one end of buffer spring is in contact with pressing plate, the other end of buffer spring is connected with the upper surface of mounting frame.The application can reduce the impact on screen, prolong the service life of screen, reduce the maintenance cost of screen.

Description

Technical Field

[0001] This invention relates to the field of arc screens, and more particularly to an arc screen striking device and an arc screen. Background Technology

[0002] In the coarse and fine coal dewatering and recovery production system, the first operation is the classification operation. Its function is to remove fine mud with high ash content as much as possible, recover coarse and fine coal mud that meets the quality requirements, strictly control the upper limit of flotation feed, and minimize the mixing of coarse and fine coal mud with low ash content. The key equipment used is the arc screen, which includes a screen mesh with screen bars. As the material layer flows from one screen bar to another, the edges of each screen bar cut the material layer. The cut part of the material is discharged through the screen gaps under the action of centrifugal force, becoming the undersize material; the uncut part of the material passes over the screen bars and becomes the oversize material.

[0003] To prevent screen clogging, existing technology provides a cylinder-driven striking device, including a cylinder and a striking head. The piston rod of the cylinder is connected to the striking head, which drives the striking head to move. The striking head has a rectangular structure and multiple striking points that automatically strike the curved screen surface. The striking points are plate-shaped. Compressed air is input to the cylinder, which performs air intake and exhaust actions, causing the piston rod to reciprocate linearly. The piston rod is connected to the striking head, which is equipped with several striking points. The piston rod drives the striking head to move, causing the striking points to strike the screen. Through this cyclical motion, the screen is continuously struck, causing it to vibrate and automatically clear blockages in the screen gaps, achieving automatic striking and cleaning of the curved screen, greatly improving the equipment's working efficiency.

[0004] To prevent clogging, the impactor must continuously strike the screen. The impact is driven directly by a cylinder. After prolonged use, the strong impact on the screen causes deformation and wear, requiring replacement and increasing the maintenance cost of the arc screen. Summary of the Invention

[0005] To address the technical problem of excessive impact force on the screen by the existing arc-shaped screen impactor, this invention provides an arc-shaped screen impact device and an arc-shaped screen, which can reduce the impact on the screen, extend the service life of the screen, and reduce the maintenance cost of the screen.

[0006] In a first aspect, the present invention provides an arc-shaped screen striking device to solve the above-mentioned technical problems, comprising a mounting frame and further comprising: a driving assembly disposed on the mounting frame; a driving shaft rotatably disposed on the mounting frame, the driving shaft being disposed along the width direction of the arc-shaped screen, and at least two eccentric wheels disposed on the driving shaft; striking rods movable along their own axial direction and disposed in guide holes on the mounting frame, the number of striking rods being the same as the number of eccentric wheels, a pressure plate disposed at the upper end of the striking rod, the pressure plate being able to abut against the eccentric wheels, and a striking head disposed at the lower end of the striking rod; and a buffer spring sleeved on the striking rod, one end of the buffer spring abutting against the pressure plate, and the other end of the buffer spring being connected to the upper surface of the mounting frame.

[0007] This invention, by employing an eccentric wheel drive and a buffer spring, can buffer the impact force, achieve flexible contact between the striking rod and the screen, and avoid damage to the screen caused by the impact, thus affecting the service life of the screen.

[0008] Furthermore, the mounting bracket is provided with two drive shafts and two rows of striking rods, the two rows of striking rods being symmetrically arranged about the striking motor of the drive assembly, and the striking motor being mounted on the mounting bracket.

[0009] By setting two rows of striking rods, this invention can increase the effective area of ​​the striking device and improve its performance.

[0010] Furthermore, the protrusions of the protrusions of two adjacent eccentric wheels are in opposite directions, and the protrusions of two eccentric wheels that are opposite to each other are also in opposite directions.

[0011] By setting the protruding directions of adjacent eccentric wheels to opposite directions, this invention can increase the frequency of action of the device on the screen, promptly discharge particles from the screen, and improve the effectiveness of the device.

[0012] Furthermore, the protrusion is rotatably provided with an abutment wheel, the circumferential surface of which can abut against the pressure plate.

[0013] This invention reduces friction between the eccentric wheel and the striking rod by setting an abutment wheel, thereby extending the service life of the striking rod.

[0014] Furthermore, it also includes a movable component, which comprises two opposing arc-shaped guide rails, on which a movable seat is movably mounted. The radius of the arc-shaped guide rails is the same as the radius of the screen. The arc-shaped guide rails are provided with gear teeth. The movable seat has a U-shaped structure with its opening facing the arc-shaped guide rails. Upper limit wheels and lower limit wheels are rotatably mounted on the inner walls of both sides of the movable seat. The upper limit wheels and the lower limit wheels abut against both sides of the arc-shaped guide rails respectively. A movable motor is provided on the top of the movable seat. The movable motor is connected to a drive gear, which can mesh with the arc-shaped guide rails. The two movable seats are respectively connected to both ends of the mounting frame.

[0015] By incorporating a movable component, this invention enables the mounting frame to move along an arc, thereby increasing the striking area of ​​the striking device and enhancing its operational flexibility.

[0016] The mounting frame includes support rods at both ends, the support rods are arc-shaped, the radius of the support rods is the same as the radius of the screen, the support rods are connected to the corresponding movable seats, and an installation rod is provided between the support rods. The installation rod is arranged along the width direction of the screen, and the striking rod is provided on the installation rod.

[0017] By setting the support rod in an arc shape, this invention ensures that the distance between the striking rod and the screen remains consistent during the movement of the mounting frame. This guarantees that the striking rod can exert a stable impact force on the arc-shaped screen during movement, ensuring a stable striking effect of the device.

[0018] Secondly, the present invention also provides an arc-shaped screen, including a screen body, the screen body including a shell, a screen mesh disposed inside the shell, and the aforementioned arc-shaped screen striking device, the shell having arc-shaped grooves on both sides, the radius of the arc-shaped grooves being the same as the radius of the screen mesh, the arc-shaped guide rail being disposed outside the shell and close to the arc-shaped grooves, the support rod having a support shaft disposed thereon, the support shaft extending from the arc-shaped grooves and movable along the arc-shaped grooves, the support shaft on the support rod extending from the arc-shaped grooves and being connected to the movable seat, and the striking rod being disposed radially along the screen mesh.

[0019] Furthermore, a guide rail is provided at the bottom of the arc-shaped groove, and a sliding groove is provided on the support shaft.

[0020] As can be seen from the above technical solutions, the present invention has the following advantages:

[0021] This invention provides an arc-shaped screen striking device and an arc-shaped screen. By employing an eccentric wheel drive and cooperating with a buffer spring, it can buffer the impact force, achieve flexible contact between the striking rod and the screen, and avoid damage to the screen and its service life. By setting two rows of striking rods, the effective area of ​​the striking device can be increased, improving its effectiveness. By setting the protruding directions of adjacent eccentric wheels in opposite directions, the frequency of the device's impact on the screen can be increased, allowing for timely discharge of particles from the screen and improving its effectiveness. By setting abutment wheels, friction between the eccentric wheels and the striking rods is reduced, extending the service life of the striking rods. By setting a moving component, the mounting frame can be moved along an arc, increasing the striking area of ​​the striking device and improving its flexibility. By setting the support rods in an arc shape, the distance between the striking rods and the screen can be kept consistent during the movement of the mounting frame, ensuring that the striking rods can act on the arc-shaped screen with a stable impact force during movement, guaranteeing a stable striking effect. Attached Figure Description

[0022] To more clearly illustrate the technical solution of the present invention, the accompanying drawings used in the description will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a structural schematic diagram of a specific embodiment of the present invention.

[0024] Figure 2 This is a schematic diagram of the assembly structure of the mounting bracket, striking rod, and drive assembly in a specific embodiment of the present invention.

[0025] Figure 3 This is a schematic diagram of the structure of the moving component in a specific embodiment of the present invention.

[0026] Figure 4 This is a structural schematic diagram of a second specific embodiment of the present invention.

[0027] In the diagram, 1. Striking motor; 2. Mounting bracket; 201. Support rod; 202. Mounting rod; 203. Support shaft; 3. Striking head; 4. Striking rod; 5. Buffer spring; 6. Drive shaft; 7. Belt drive assembly; 8. Eccentric wheel; 9. Abutment wheel; 10. Arc-shaped guide rail; 11. Moving motor; 12. Moving seat; 13. Drive gear; 14. Lower limit wheel; 15. Upper limit wheel; 16. Housing; 17. Arc-shaped groove. Detailed Implementation

[0028] To make the objectives, features, and advantages of this invention more apparent and understandable, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments. Obviously, the embodiments described below are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this patent, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this patent. Specific Implementation Method 1

[0030] like Figure 1 and Figure 2 As shown in the figure, this specific embodiment provides an arc-shaped screen striking device and an arc-shaped screen, including a mounting frame 2, a drive assembly, a striking rod 4, and a drive shaft 6; the drive assembly is mounted on the mounting frame 2; the two ends of the drive shaft 66 are rotatably mounted on the mounting frame 2 via bearings, and the drive assembly can drive the drive shaft 66 to rotate axially. The drive shaft 66 is arranged along the width direction of the arc-shaped screen, and at least two eccentric wheels 8 are provided on the drive shaft 66. The eccentric wheels 8 and the drive shaft 6 are an integral structure; the striking rod 4 is movably mounted on the mounting frame 2 along its own axial direction. The number of striking rods 4 in the guide holes on the mounting bracket 2 is the same as the number of eccentric wheels 8. A pressure plate is provided at the upper end of each striking rod 4, which can abut against the eccentric wheel 8. A striking head 3 is provided at the lower end of each striking rod 4. A buffer spring 5 is sleeved on the striking rod 4. One end of the buffer spring 5 abuts against the pressure plate, and the other end of the buffer spring 5 is connected to the upper surface of the mounting bracket 2. In this specific embodiment, the striking head 3 is made of ultra-high molecular weight polyethylene plate, which can further reduce the wear on the screen plate compared with the use of metal materials.

[0031] This specific embodiment, by employing an eccentric wheel 8 for driving and cooperating with a buffer spring 5, can buffer the impact force and achieve flexible contact between the striking rod 4 and the screen. Compared with the existing technology that uses a cylinder for direct hard contact, the impact force is smaller and the deformation of the screen is smaller. At the same time, the use of the eccentric wheel 8 also forms intermittent striking, which, compared with the rapid striking of the cylinder, allows the elastic deformation of the screen to recover to a certain extent, reduces the superimposed dynamic load on the screen, avoids damage to the screen caused by the striking, and prevents the screen from being shortened in terms of service life.

[0032] like Figure 2 As shown, since the state of the object being worked on by the arc screen often changes, in order to facilitate the adjustment of the striking speed and ensure the striking effect while reducing the impact wear on the screen, in this specific embodiment, the driving component includes a striking motor 1 and a belt drive component 7. The striking motor 1 is mounted on the main crossbeam of the mounting frame 2, and the output shaft of the striking motor 1 is connected to the belt drive component 7, which drives the drive shaft 6 to rotate.

[0033] like Figure 1 As shown in this specific embodiment, in order to expand the working area of ​​the striking device, the mounting frame 2 is provided with two drive shafts 66 and two rows of striking rods 4. At the same time, two sets of belt drive components 7 are provided. The two rows of striking rods 4 are symmetrically arranged about the striking motor 1 of the drive components. The striking motor 1 is mounted on the mounting frame 2. Furthermore, the protrusion directions of the protrusions of two adjacent eccentric wheels 8 are opposite, and the protrusion directions of two front and rear opposite eccentric wheels 8 are also opposite. This can form a vibration superposition on the screen striking area, increase the striking frequency, increase the striking effect, and promptly discharge particles from the screen, thereby improving the effectiveness of the device.

[0034] like Figure 1 As shown, preferably, the protrusion is rotatably provided with an abutment wheel 9, the circumferential surface of which can abut against the pressure plate; by providing the abutment wheel 9, the friction between the eccentric wheel 8 and the striking rod 4 is reduced, and the service life of the striking rod 4 is extended.

[0035] like Figure 1 and Figure 3 As shown, due to the certain gap between the two rows of striking rods 4, the corresponding area of ​​the screen cannot be directly struck. The clogging particles can only be removed through vibration. To improve the anti-clogging effect of this device and ensure comprehensive striking of the screen, this specific embodiment also includes a moving component. The moving component includes two opposing arc-shaped guide rails 10, on which a moving seat 12 is movably mounted. The radius of the arc-shaped guide rails 10 is the same as the radius of the screen. Multiple gear teeth are evenly arranged on the arc-shaped guide rails 10. The moving seat 12 has a U-shaped structure with its opening facing the arc-shaped guide rails 10. Upper limit wheels 15 and lower limit wheels 14 are rotatably mounted on the inner walls of both sides of the moving seat 12. The upper limit wheels 15 and lower limit wheels 14 respectively abut against the screen. On both sides of the arc-shaped guide rail 10, a moving motor 11 is provided on the top of the moving base 12. The moving motor 11 is connected to a drive gear 13, which can mesh with the arc-shaped guide rail 10. The two moving bases 12 are respectively connected to both ends of the mounting frame 2. By moving the mounting frame 2 along the arc-shaped guide rail 10 through the moving bases 12, the striking area of ​​this device can be moved, so as to achieve comprehensive striking of the screen. With this setting, all positions of the screen can be directly struck. Compared with the prior art, if a larger striking area is required, the striking force can only be increased, resulting in greater vibration and a larger working area. However, greater vibration will impact the screen. This device can achieve a larger working area by moving the mounting frame 2 without increasing the impact force, further reducing the impact on the screen.

[0036] like Figure 2As shown, preferably, the mounting frame 2 includes support rods 201 at both ends. The support rods 201 have an arc-shaped structure, and their radii are the same as the radius of the screen. The support rods 201 are connected to the corresponding movable seats 12. An installation rod 202 is provided between the support rods 201, and the installation rod 202 is arranged along the width direction of the screen. The striking rod 4 is provided on the installation rod 202. By setting the support rods 201 to be arc-shaped, the distance between the striking rod 4 and the screen can be kept consistent during the movement of the mounting frame 2, ensuring that the striking rod 4 can act on the arc-shaped screen with a stable impact force during the movement, thus ensuring a stable striking effect of the device.

[0037] In this specific embodiment, the mounting frame 2 is a welded structure, the mounting rod 202 is located at the lower part of the main crossbeam, and the support rod 201 is connected to the end of the main crossbeam through a connecting rod.

[0038] In this device, by setting the front and rear eccentric wheels 8 and the protrusion angles of adjacent eccentric wheels 8 in opposite directions, the vibration of the impact area can be superimposed, increasing the vibration effect on the screen. At the same time, with the movement of the mounting frame 2, the screen is vibrated in its entirety without the need for a large impact force, ensuring the anti-clogging effect of the impact while reducing the impact wear on the screen.

[0039] The working process of this device is as follows:

[0040] When the arc screen is working, both the striking motor 1 and the moving motor 11 start to rotate; the striking motor 1 drives the two drive shafts 6 to rotate, and the eccentric wheel 8 on the drive shaft 6 drives the corresponding striking rod 4 to move up and down to impact the screen, and then resets under the action of the buffer spring 5; the moving motor 11 drives the mounting frame 2 to move back and forth along the arc curve to achieve a comprehensive impact on the screen. Specific Implementation Method Two

[0042] This specific embodiment provides an arc-shaped screen, including a screen body, the screen body including a housing 16, a screen mesh disposed inside the housing 16, and an arc-shaped screen striking device according to specific embodiment one. Arc-shaped grooves 17 are provided on both sides of the housing 16, the radius of the arc-shaped grooves 17 is the same as the radius of the screen mesh. To avoid water leakage, the arc-shaped grooves 17 are higher than the screen mesh by a set distance. An arc-shaped guide rail 10 is disposed on the outside of the housing 16 and close to the arc-shaped grooves 17. The arc-shaped guide rail 10 is connected to the housing 16 by a bracket and bolts. A support shaft 203 is provided on the side of the support rod 201. The support shaft 203 extends out of the arc-shaped groove 17 and can move along the arc-shaped groove 17. After the support shaft 203 on the support rod 201 extends out of the arc-shaped groove 17, it is connected to the movable seat 12. The striking rod 4 is arranged radially along the screen mesh. In this specific embodiment, three support shafts 203 are provided on each side, and the middle one is connected to the movable seat 12.

[0043] Preferably, the bottom of the arc-shaped groove 17 is provided with a guide rail, and each of the three support shafts 203 is provided with a sliding groove. The guide rail can also play a limiting role, ensuring that the distance between the striking rod 4 and the screen does not change.

[0044] The length and position of the arc groove 17 and the arc guide rail 10 can be determined according to the area where the screen is blocked. In this embodiment, the arc groove 17 and the arc guide rail 10 are located in the lower part of the housing 16.

[0045] As can be seen from the above specific embodiments, the present invention has the following beneficial effects:

[0046] 1. By using an eccentric wheel 8 for drive and cooperating with a buffer spring 5, the impact force can be buffered, and the striking rod 4 can be made into flexible contact with the screen, so as to avoid damage to the screen and affect the service life of the screen.

[0047] 2. By setting two rows of striking levers 4, the effective area of ​​this striking device can be increased, thereby enhancing its effectiveness;

[0048] 3. By setting the protruding directions of adjacent eccentric wheels 8 to opposite directions, the frequency of action of this device on the screen can be increased, the particles in the screen can be discharged in time, and the effect of this device can be improved.

[0049] 4. By setting the abutment wheel 9, the friction between the eccentric wheel 8 and the striking rod 4 is reduced, thus extending the service life of the striking rod 4; by setting the moving component, the mounting frame 2 can be driven to move along an arc, increasing the striking working area of ​​this striking device and improving the flexibility of this device in use.

[0050] 5. By setting the support rod 201 into an arc shape, the distance between the striking rod 4 and the screen can be kept consistent during the movement of the mounting frame 2, ensuring that the striking rod 4 can act on the arc-shaped screen with a stable impact force during the movement, thus ensuring the stable striking effect of the device.

[0051] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A device for striking an arc screen, comprising a mounting frame (2), characterized in that, Also includes: A drive component is disposed on the mounting bracket (2). A drive shaft (6) is rotatably mounted on the mounting frame (2). The drive shaft (6) is arranged along the width direction of the arc screen, and at least two eccentric wheels (8) are provided on the drive shaft (6). A striking rod (4) is provided in a guide hole on the mounting bracket (2) and can be moved along its own axis. The number of striking rods (4) is the same as the number of eccentric wheels (8). A pressure plate is provided at the upper end of the striking rod (4) and the pressure plate can abut against the eccentric wheel (8). A striking head (3) is provided at the lower end of the striking rod (4). A buffer spring (5) is sleeved on the striking rod (4). One end of the buffer spring (5) abuts against the pressure plate, and the other end of the buffer spring (5) is connected to the upper surface of the mounting bracket (2). It also includes a moving component, which includes two opposing arc-shaped guide rails (10), on which a moving seat (12) is movably mounted. The radius of the arc-shaped guide rail (10) is the same as the radius of the screen. The arc-shaped guide rail (10) is provided with gear teeth. The moving seat (12) has a U-shaped structure and its opening faces the arc-shaped guide rail (10). Upper limit wheel (15) and lower limit wheel (14) are rotatably mounted on the inner walls of both sides of the moving seat (12). The upper limit wheel (15) and the lower limit wheel (14) respectively abut against the two sides of the arc-shaped guide rail (10). A moving motor (11) is provided on the top of the moving seat (12). The moving motor (11) is connected to a drive gear (13). The drive gear (13) can mesh with the arc-shaped guide rail (10). The two moving seats (12) are respectively connected to the two ends of the mounting frame (2).

2. The sieve device as claimed in claim 1, characterized in that The mounting bracket (2) is provided with two drive shafts (6) and two rows of striking rods (4). The two rows of striking rods (4) are symmetrically arranged about the striking motor (1) of the drive assembly. The striking motor (1) is mounted on the mounting bracket (2).

3. The sieve device as claimed in claim 2, characterized in that The protrusion directions of the protrusions of two adjacent eccentric wheels (8) are opposite, and the protrusion directions of two front-to-back eccentric wheels (8) are also opposite.

4. The sieve device as claimed in claim 3, wherein the sieve device is a sieve bend. The protrusion is rotatably provided with an abutment wheel (9), the circumferential surface of which can abut against the pressure plate.

5. The sieve device as claimed in claim 1, wherein, The mounting frame (2) includes support rods (201) at both ends. The support rods (201) are arc-shaped and have the same radius as the screen. The support rods (201) are connected to the corresponding movable seats (12). An installation rod (202) is provided between the support rods (201). The installation rod (202) is arranged along the width direction of the screen. The striking rod (4) is provided on the installation rod (202).

6. An arc screen comprising a screen body, the screen body comprising a housing (16) within which is disposed a screen deck, characterised in that, It also includes the arc-shaped screen striking device as described in claim 5, wherein arc-shaped grooves (17) are provided on both sides of the housing (16), the radius of the arc-shaped grooves (17) is the same as the radius of the screen, the arc-shaped guide rail (10) is provided on the outside of the housing (16) and close to the arc-shaped grooves (17), a support shaft (203) is provided on the support rod (201), the support shaft (203) extends out from the arc-shaped groove (17) and can move along the arc-shaped groove (17), the support shaft (203) on the support rod (201) extends out from the arc-shaped groove (17) and is connected to the moving seat (12), and the striking rod (4) is arranged radially along the screen.

7. The sieve bend of claim 6 wherein, The bottom of the arc-shaped groove (17) is provided with a guide rail, and the support shaft (203) is provided with a sliding groove.

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